Datasheet

173
8024A–AVR–04/08
ATmega8HVA/16HVA
Note: 1. 2.2 t
CLCL
for f
ck
< 12 MHz, 3 t
CLCL
for f
ck
>= 12 MHz
29.8.2 High-voltage Serial Programming
Figure 29-4. High-voltage Serial Programming Timing
Table 29-8. Serial Programming Characteristics, T
A
= -10°C to 70°C, V
CC
= 3.0 - 5.5V (Unless Otherwise Noted)
Symbol Parameter Min Typ Max Units
1/t
CLCL
Oscillator Frequency (ATmega8HVA/16HVA) 0 4 MHz
t
CLCL
Oscillator Period (ATmega8HVA/16HVA) 250 ns
t
SHSL
SCK Pulse Width High 2.2 t
CLCL
(1)
t
SLSH
SCK Pulse Width Low 2.2 t
CLCL
(1)
t
OVSH
MOSI Setup to SCK High t
CLCL
t
SHOX
MOSI Hold after SCK High 2 t
CLCL
t
SLIV
SCK Low to MISO Valid 15 ns
Table 29-9. High-voltage Serial Programming Characteristics T
A
= 25°C ± 10%, V
CC
= 3.3V ±
10% (Unless otherwise noted)
Symbol Parameter Min Typ Max Units
t
SHSL
SCI (PC0) Pulse Width High 1/f
ck
ns
t
SLSH
SCI (PC0) Pulse Width Low 1/f
ck
ns
t
IVSH
SDI (PB2), SII (PB3) Valid to SCI (PC0) High 50 ns
t
SHIX
SDI (PB2), SII (PB3) Hold after SCI (PC0) High 50 ns
t
SHOV
SCI (PC0) High to SDO (PB1) Valid 16 ns
t
WLWH_PFB
Wait after Instr. 3 for Write Fuse Bits 2.5 ms
SDI , SII
SDO
SCI
t
IVSH
t
SHSL
t
SLSH
t
SHIX
t
SHOV